Question
Question: The straight lines y = m<sub>1</sub> x + c<sub>1</sub> and y = m<sub>2</sub>x + c<sub>2</sub> will m...
The straight lines y = m1 x + c1 and y = m2x + c2 will meet the co-ordinate axis in concyclic points if –
A
m1 m2 = 2
B
c1 c2 = 2
C
m1 m2 = 1
D
c1 c2 = 1
Answer
m1 m2 = 1
Explanation
Solution
y = m1x + c1 & y = m2 x + c2
Equation of conic section
(m1 x – y +c1) (m2 x – y + c2) + l xy = 0
Represents circle coffe. of x2 = coffe. of y2
m1m2 = 1